Wan Bakar, W.Z. and Mohd Saaid, I. and Ahmad, M.R. and Amir, Z. and Japperi, N.S. and Ahmad Fuad, M.F.I.  (2022) Improved water saturation estimation in shaly sandstone through variable cementation factor.  Journal of Petroleum Exploration and Production Technology, 12 (5).  pp. 1329-1339.  ISSN 21900558